Forming machine



C. G. GROTNES. FORMING MACHINE. APPLICATION FILED SEPL'SO, 1919. 1,407,148. Patented Feb. 21, 1922'.

2 SHEETS-SHEET lgl 7 [HIM c. G. eaomas. FORMING MACHINE. APPLI CATION FILED SEPT-30, 19] 9.

1,407,148. Patented Feb. 21, 1922.

2 sums-sum 2.

\lllllllllllllllllll Jmkniaz iii/ - 1 UNITED. 1w

' cnnnnns G. eno'rnns, or onioAe-o, iLn In oIs.

FORMIN nimofimnf,

Specification of Letters Patent.

To all whom it may concern Be it known that I CHARLES G. GRo'rNns, a citizen ofthe United States, residing-at Chicago, in the county of Cook andState of Illinois, have invented certain new and'useful Improvements in F ormlng-Machine's, of

' which the following is a specification.

My invention relates to machines for forming circular parts such as the rims of vehicle wheels by compressing a circular hoop to exact size and diameter with or without simultaneously shaping the edges'or other portions thereof by means of suitable dies.

An object of my'inv'ention is to secure ahigh degree of uniformity in the finished product and to provide "a machine Which can be adjusted to secure not only uniformity but accuracy in the size of the rims produced. 7

Another object is to provide a machine which will handle the rims in such a position that-they can be put in'the machine and removed therefrom with great speed and very little effort by the operator. 7 v

Another object is to provide a machine ofthis type which will be much more reliable than those hitherto employed both as to durability in the wear and tear of service, and as to freedom from'accidental breakage.

Further objects and advantages of my invention will become'appare'nt as'the description proceeds.

In the accompanylngdrawings, Figure 1- is a central longitudinal section of a machine embodying the principles of my invention. Fig. 2 is a transverse section through the corinectingpin. Fig. 3'is an end view looking at the face of the machine along its axis, with portions brokenaway and in section. Fig. 4 is a detail view of the plunger, and Fig. 5 is a vi'ew of the cross head.

The herein described embodiment of my invention comprises amovable head carryingfa plurality of segmental blocks radiallyslidable'thereon, toggle mechanism for forc-' ing the blocks inwardly, means for quickly;

. rat nteane gm, 11922,; fpp i o 'fi September so, 1e19.' -seria1-m.327550.

lected for illustration, 1O designates a lon- 7 an" inclined position'on a foot 11* formed at .gitudinally extending frame' supported in therear end thereof and a main supporting block 12 as clearly illustrated in F ig. 1. This. frame'has opposite walls 13 which'I have illustrated in 2 as approximately chananel-sh'ape with the flanges turned-outwardly.v

Apair of brackets 14 suitablybolted as'at 15 Y to the upper and lowersides of the front end of the frame support a stationa four radially extending 'arms 17.

' A circular plate or head 18 is mounted to ry ring 16 on, j

65. reciprocate from a positiontremoved rear-' 19 and fastened to the head 18 by suitable bolts '24 confines all the blocks'19slidably between itsel'fand the face of the head 18.

Each block 19:is moved axially toward and away from the centerof the head as the head reciprocates, bya toggle mechanism compris-- Y ing a pin 25 fastened through the axially extending portion 22 of the block, a similar pin 26 mounted in a stationary block 27 suitably attached to the'stationary ring 16 and a linkconnection between said pins. The concavi-- ties in which the pins 25 and 26 rest are sufficiently deep to produce projecting portions or ears 25 whioh serve to prevent displace ment of the pins. The linkconnection between said pins comprises two tension links 28 engaging the projecting ends of the-pins '25 and 26 and a compression'link 29 having cylindrical sockets at its ends as "clearly illustrated in Fig. 1 engaging the 5 central portions'of the pins 25 and 26. Theforjce whichmay safely be exerted by a compression link such as 29 on the pins is obviously much greater than ins.

the shear strength of' the' While a is obviousthat-1inks28 cmas mit compression as well as tension stresses, the length of the link 29 is considerably shorter and its cross section appreciably greater than the combined cross section of links 28 so that the deformations under stresses will be such that most of the compression load will be carried by link 29.

Means for reciprocating the head 18 are. plunger 30 suitably provided comprising a engaging said head as by means of a central boss 31 and a circular flange 32 reinforced by ribs 33, on which bossand flange the head 18 fits and to which it is suitably attached. The plunger 30 as illustrated in- Fig. 2 slides between the walls 13 of the frame 10. In-

, ward-1y projecting flanges 34 suitably reinforced by webs. 35 support the plunger 30 which moves in sliding contactwith their upper face, a portion of the inner faces of the opposing channels 13 and the lower face of a suitable retaining bracket 36. As

Y in Fig. 5 carries thev pin 41 for the connecting link 42 actuated by the eccentric 43 to reciprocate plunger 30. This cross head 40 is of approximately U-shape, the bight being channel shape with an inclined web as indicated at 44 in Fig. l and the arms being slidable on inwardly projecting flanges 45 (see Fig. 2) on the plunger 30 engaging suitable grooves in said cross head. 7

The plunger has a central cross-piece 46 which receives the thrust of the cross head 40 during the operating stroke through a spacing wedge 47 of rather acute taper. A tensionrod 48 projects from the bight of the cross head 40 through a suitable slot in the wedge 47 and a suitable 'hole inthe cross piece a suitable distance beyond said cross piece to carry a nut 49 between which and the cross piece the compression spring 50 is confined. On the return stroke the weight of the head' and plunger might in most instances be sufficient to carry them back as the cross head moves back but in chinery of this sort accidents of a seriousnature are apt to occur by reason of tools or ordinarily break the machine itself necessitating expensive repairs and delay. The resilient connection afforded by the spring 50 on the return stroke will allow the power applied to the eccentric 43 to draw the cross 1 head 4.0 back to its initial position without provided means for adjusting the final point. to which the plunger and head will be carried by the compression stroke thus'making possible a very precise adjustment of the diameter of the finished work. The wedge 47 is held inposition by a spacing rod 51 suitably socketed' at 52 at its lower end on the upper edges of the cross piece 46 and having engagement with the forwardly extending portion 53 at the upper end of the wedge 47. The shaft 51 may be rotated by means of a suitable hand wheel 54 to shift the wedge 47 and adjust the stroke of the plunger and head. 7 7

Any suitable or preferred source of power may be used to drive the eccentric 43., I have illustrated bearings conveniently; formed in and mounted upon the frame 10 adapted to'supporta high speed shaft which may be suitably geared to anintermediate shaft 56 which in turn may be geared to the eccentric 43.

The inclined position in which my entire device stands upon the supporting floor or other structure is decidedly advantageous in handling the work as. the rims maybe stacked on one side of the machine and rolled in front of and placed in the machine with a minimum expenditure of time and effort on the part of the workman, and simi-- larly lifted out of the machine, dropped on edge on the floor and rolled away.

While I have illustrated and described in detail the embodiment of my invention at present preferred it should be clearly un-' derstood that the disclosure is for purposes of illustration only and that'many variationsand modifications will naturally occur to those skilled in the art. I aim in the subjoined claims to cover all such legitimate modifications and variations. 1

I claim as my invention:

1. A device of the class describedhaving, in combination, a plurality of radially slidable and axially movable compression. jaws, toggle means for moving said jaws radially upon axial vmovement thereof, and means for adjusting the axial movement of said jaws to vary the radial movement produced by said toggles. I r j 2. A device of the class described having, in combination, a reciprocating head, radially slidable blocks on said head, toggle mechanism actuating said blocksin a radial direction upon axial movement of said head, powermeans for moving said head axially and an adjustable connection for' varying the stroke of said power .means.

3. A. device of the class'described, having, I

in combination, stationary and movable parts, a poweradriven element adapted to reciprocate said moving parts and means providing a' positive connection between said power driven element and said movable: parts for motion in a direction to ojpera'te neomas f' i upon the work and a resilient connection between; said power driven element and said movable parts for motion in the other direction. l w.

4. A device of the class described having, in combination, a plurality of radially slidable compression blocks defining a circular cavity, "and means for moving said blocks radially, said blocks being located in a plane inclined to the vertical.

5. A device of the class described having, in combination, a frame, a stationary ring supported by said frame, a reciprocating head-adapted to move toward'and away from the plane of said ring, an annular series of radially slidable blocks carried by said reciprocating head and defining a cir cular space to receive material to be com-' pressed, said head being at the side of said space opposite to the open or receivingside, and toggle links connecting said radially slidable blocks with said stationary ring.

.6. A device of the class described having, in combination, a plurality of radially slidable jaws, means for imparting simultaneous axial movement to all of said jaws, means for moving said jaws-radiallyupon axial movement thereof, and means for adjusting the axial movement of said jaws to vary the radial movement produced thereby.

7. A device of the class described having, in combination, operating members defining a cavity, means for supporting said operating members with said cavity lying in a plane inclined to the vertical, and means for actuating said members to operate upon a piece of material placed in said cavity.

8. A device of' the class described having, in combination, a frame, a stationary ring supported by said frame, a reciprocating head adapted to move toward and away from the plane of saidv ring, radially slidable blocks carried by said reciprocating head, toggle links connecting said radially slidable blocks with said stationary ring, a reciproeating member, a positive connection between said reciprocating member and said head for moving said head toward the plane of said ring, and a resilient connection be tween said member and said head for moving said head in the opposite direction.

9. A device of the class described having,

in combination, a frame, a stationary ring supported by said frame, a reciprocating head adapted to move toward and away from the plane of said ring, radially slidable blocks carried by said reciprocating head, toggle links connecting said radially slidable blocks with said stationary ring, a reciprocating member, a positive connection between said reciprocating member and said head for moving said head toward the plane of said ring a resilient connection between said member and said head for moving said head in the opposite direction, and quickly adjustable means interpolated in said posi tiveiconnectionfor adjustingthestroke-of;

said head. I

v10. A'device ofithe class' describedhavinga in combination, a frame,ia stationary ring supported by Sa1d frame,aa "rec procating head adapted tomojv'e toward and awafy'from the plane of said ring, radially slidable; .blocks carried by said-reciprocating head,

toggle links connecting said radially slidable blocks with said stationary ring, a slidable plunger carrying said head, a cross head slidably mounted in said plunger, means for imparting a reciprocating motion, to said cross head, a positive connection operating by abutment against one face of said cross head for forcing said-plunger in one direction, and a'resilient connection allowing relative sliding motion between said crosshead and plunger adapted to resiliently urge said plunger in the opposite direction.

11. A device of the class described having,'in combination, a frame,.a stationary I ring supported by said frame, a reciprocating head adapted to move toward and away from the plane of said ring, radially slidable blocks carried by said reciprocating head, toggle links connecting said radially slidable blocks withsaid stationary ring, a

slidable plunger carrying said head, a cross tively movable members, a tension or. compression link pivotally connected between the ,ends of said pins, and a link adapted to transmit compression only extending be-; tween said pins and having fitting faces at its ends abutting said pins.

18. A device of the class described having, in combination, a stationary ring, a head movable toward and away from'the plane of. I said ring, radially slidable members carried.

by said head and toggle links connecting said members to sand rlng, each link comprising circular pins mounted in said'radially slidable member and said stationary ring, a

link pivotally engaging'one end of each of i said pins and adapted to transmit either tension or compression and a link adapted to transmit compression only extending from one pin to another and having its ends fitting upon and abutting the surfaces of said pins.

14.. A linkage for a toggle connection having, in combination, relatively movable members, pins passing through said members and having contact therewith from side to side of said members over a considerable portion of the cylindrical surface of the pin, ears on said members overlying portions of covered by said ears, said pins projecting beyond the sides'oi said members and additional links connecting the projecting portions of said pins. 7 y

In testimony whereof, I have hereunto set my hand. v

@HAELES e. seem I 

